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單項選擇題

If you make different trade in different countries, you must take different transport modes? （）

A.Yes
B.Not
C.It must be based on cost
D.Not mention in the paragraph

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單項選擇題

Pipeline is low cost and reliable. Is it true? （）

A.Dependable
B.Not
C.Yes
D.Not mention here

單項選擇題

Cost of pipeline is very different of underground conditions. Is it right? （）

A.Not
B.Yes
C.They can’t compare
D.Not discussion in the paragraph